Synthesis of an Isomer of the Decalinoyltetramic Acid Methiosetin by a Stereocontrolled IMDA Reaction of a Metal-Chelated 3-Trienoyltetramate
作者:Markus Winterer、Karl Kempf、Rainer Schobert
DOI:10.1021/acs.joc.6b00750
日期:2016.9.2
An isomer of the 3-decalinoyltetramic acid methiosetin was synthesized for the first time. The decalin moiety was established by a late-stage intramolecular Diels–Alder cyclization catalyzed by Me2AlCl or La(OTf)3. Its high diastereoselectivity arose from stereoinduction by a well-defined metal O,O-chelate complex of the 3-acyltetramic acid moiety. The nature of the metal and the bulkiness of the residues
首次合成了3-十氢萘基四甲酸甲硫定素的异构体。萘烷部分是由Me 2 AlCl或La(OTf)3催化的后期分子内Diels-Alder环化作用建立的。其高的非对映选择性是由3-酰基四酸部分的明确定义的金属O,O-螯合物形成的立体感应而产生的。金属的性质和在四酸螯合剂处的残基的体积对于立体化学结果是决定性的。